While L1, L2 and L3 phases are over or under voltage, the yellow light is lighted with the unlighted green light and the released relay.是什么意思_While L1, L2 and L3 phases are over or under voltage, the yellow light is lighted with the unlighted green light and the released relay.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句